Design and Optimization of Benzimidazole-Containing Transient Receptor Potential Melastatin 8 (TRPM8) Antagonists

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• 作者：Daniel J. Parks ; William H. Parsons ; Raymond W. Colburn ; Sanath K. Meegalla ; Shelley K. Ballentine ; Carl R. Illig ; Ning Qin ; Yi Liu ; Tasha L. Hutchinson ; Mary Lou Lubin ; Dennis J. Stone ; Jr. ; Judith F. Baker ; Craig R. Schneider ; Jianya Ma ; Bruce P. Damiano ; Christopher M. Flores ; Mark R. Player
• 刊名：Journal of Medicinal Chemistry
• 出版年：2011
• 出版时间：January 13, 2011
• 年：2011
• 卷：54
• 期：1
• 页码：233-247
• 全文大小：1144K
• 年卷期：v.54,no.1(January 13, 2011)
• ISSN：1520-4804

文摘

Transient receptor potential melastatin 8 (TRPM8) is a nonselective cation channel that is thermoresponsive to cool to cold temperatures (8鈭?8 掳C) and also may be activated by chemical agonists such as menthol and icilin. Antagonism of TRPM8 activation is currently under investigation for the treatment of painful conditions related to cold, such as cold allodynia and cold hyperalgesia. The design, synthesis, and optimization of a class of selective TRPM8 antagonists based on a benzimidazole scaffold is described, leading to the identification of compounds that exhibited potent antagonism of TRPM8 in cell-based functional assays for human, rat, and canine TRPM8 channels. Numerous compounds in the series demonstrated excellent in vivo activity in the TRPM8-selective 鈥渨et-dog shakes鈥?(WDS) pharmacodynamic model and in the rat chronic constriction injury (CCI)-induced model of neuropathic pain. Taken together, the present results suggest that the in vivo antagonism of TRPM8 constitutes a viable new strategy for treating a variety of disorders associated with cold hypersensitivity, including certain types of neuropathic pain.